solve it ASAP and please show the steps clearly

An evaporator, working at atmospheric pressure, is used to concentrate a solution from 5 per cent to 20 per cent solids at the rate of 1.25 kg/s. The solution, which has a specific heat capacity of 4.18 kJ/kg K, is fed to the evaporator at 295 K and boils at 380 K. Dry satucated steam at 240 LN/m is fed to the calandria, and the condensate leaves at the temperature of the condensing stream of 374K. If the heat transfer coefficient is 2.3 kW/mK, what is the required area of heat transfer surface and how much steam is required? The enthalpy of vaporization of the solution may be taken as being the same as that of water